On 11/12/2010 02:07 AM, 黄亮 wrote:

Hi Alex

Thank you for your reply.

I just wanna make sure I'm not misunderstanding, virStorageVolGetXMLDesc & virStorageVolCreateXMLFrom together can do the clone process, am I right?

In fact, libvirt will call a group of APIs to complete vol-clone operation, you can track the whole calling process, it looks like this:
                                              virsh vol-clone <vol-key> <newname>
                                                                           |
                                                                          V
                                                             virConnectOpenAuth
                                                                           |
                                                                          V
                                                        virStorageVolLookupByKey
                                                                           |
                                                                          V
                                                       virStoragePoolLookupByVolume ('default' is default pool)
                                                                           |
V
   virStorageVolGetXMLDesc
                                                                           |
                                                                          V
                                                     virStorageVolCreateXMLFrom
                                                                           |
                                                                          V
         virStorageVolGetName (twice)
   |
V
                                                            virStorageVolFree    (twice)
                                                                           |
                                                                          V
                                                             virStoragePoolFree
                                                                           |
                                                                          V
                                                               virConnectClose


Alex

Regards

2010-11-12

Lancer

发件人： Alex Jia

发送时间： 2010-11-10 13:28:21

收件人： 黄亮

抄送： libvir-list

主题： Re: [libvirt] Is there an API for clone?

Hi lancer,

As Osier said, libvirt hasn't a independent API for cloning an

existing guest, instead of using virStorageVolGetXMLDesc API to

get a guest volume xml description and then calling

virStorageVolCreateXMLFrom API to clone a new volume.

For python-virtinst component, you may use virt-clone to implement

this, for libvirt component, you may directly use python binding

API or virsh tool 'vol-clone' to implement it.

I hope it's helpful for you.

- Alex

----- Original Message -----

From: "黄亮" <lancerhuang@163.com>

To: "libvir-list" <libvir-list@redhat.com>

Sent: Wednesday, November 10, 2010 9:30:28 AM GMT +08:00 Beijing / Chongqing / Hong Kong / Urumqi

Subject: [libvirt] Is there an API for clone?

Hi, guys

I know there is a command "virt-clone", but I couldn't find the equivalent API here : http://libvirt.org/html/libvirt-libvirt.html

So, is there an API to clone an existing VM or not?

Thank you!

Regards

2010-11-10

Lancer

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